Infrared and Laser Engineering, Volume. 54, Issue 8, 20250164(2025)
LSTM-Transformer hybrid model for infrared spectral correction
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Fig. 2. Schematic diagram of Fourier infrared spectrum detection system
Fig. 5. Real infrared spectra of 70 ℃ blackbody at different ambient temperatures
Fig. 10. Effect chart of spectral curve correction at non-standard temperature by LSTM prediction algorithm
Fig. 13. Effect chart of spectral curve correction at non-standard temperature by HM prediction algorithm
Table 1. Model and performance of core components
View tableView in ArticleTable 1. Model and performance of core components
Name Model Performance Blackbody calibration source BL676 portable blackbody calibration source Temperature range: 35-500 ℃ Aperture: 50 mm Resolution: 0.1 ℃ Power supply: 220 V AC, 500 VA Heating time to 500 ℃ in ambient temperature: less than 1 h Mid-wave infrared spectrometer DInSb5-HS type InSb detector Photosensitive area: 2 mm Peak responsivity: 3 A/W Wavelength range: 2-5.5 μm Dark current: 30 A Long-wave infrared spectrometer PVM-2 TE-8 type MCT detector Photosensitive area: 2 mm Peak responsivity: 0.23 A/W Wavelength range: 5-18 μm Dark current: 30 A
Table 2. MSE before correction of spectral curve at non-standard temperature
View tableView in ArticleTable 2. MSE before correction of spectral curve at non-standard temperature
T/℃ Actual internal temperature/℃ MSE 5 7.572399 0.306340213 15 14.476527 0.224058692 25 23.504139 Standard value 35 32.552644 0.114661667 45 41.005699 0.165439797 55 51.078081 0.246923356
Table 3. MSE after LSTM correction of spectral curve at non-standard temperature
View tableView in ArticleTable 3. MSE after LSTM correction of spectral curve at non-standard temperature
Temperature/℃ MSE before calibration MSE after LSTM calibration 5 0.306340213 0.028456732 15 0.224058692 0.033912847 35 0.114661667 0.030125678 45 0.165439797 0.035478213 55 0.246923356 0.027893451 Total 0.211484745 0.031173384
Table 4. MSE of the spectral curve at non-standard temperatures after HM correction
View tableView in ArticleTable 4. MSE of the spectral curve at non-standard temperatures after HM correction
T/℃ MSE before calibration MSE after LSTM calibration MSE after HM calibration 5 0.3063402 0.0284567 0.0055026 15 0.2240586 0.0339128 0.0040373 35 0.1146616 0.0301256 0.0041217 45 0.1654397 0.0354782 0.0041698 55 0.2469233 0.0278934 0.004171 Total 0.2114847 0.0311733 0.0044006
Table 5. Comparison of correction results
View tableView in ArticleTable 5. Comparison of correction results
Mode R2 MSE Before calibration 0.14 0.211484745 LSTM model calibration 0.85 0.031173384 HM model calibration 0.97 0.004400689
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Zheng FANG, Yuao GAO, Hanbo WANG. LSTM-Transformer hybrid model for infrared spectral correction[J]. Infrared and Laser Engineering, 2025, 54(8): 20250164
Paper Information
Category: 光电测量
Received: Mar. 12, 2025
Accepted: --
Published Online: Aug. 29, 2025
The Author Email: Zheng FANG (fangzheng@xmu.edu.cn)
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